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HomeTaxes & DutiesInheritance Tax (IHT) Calculator UK 2026/27 — Allowances & 40% Rate
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Inheritance Tax (IHT) Calculator UK 2026/27 — Allowances & 40% Rate

Calculate UK Inheritance Tax (IHT) liabilities, Nil Rate Band (£325k), and Residence Nil Rate Band (£175k).

Estate Valuation & Inheritance Tax (IHT) Details

Total Gross Estate Valuation (£ - Property, Cash, Investments)
£
Residence Nil Rate Band (RNRB) Eligible Home Passed to Direct Descendants?
Transferred Allowance from Deceased Spouse / Civil Partner?
Estimated Inheritance Tax (IHT) Bill
£60,000.00
Total Tax-Free Threshold Exemption: £500,000.00 Exempt

📊 Inheritance Tax Calculation Breakdown

Standard Nil Rate Band (NRB) £325,000.00
Residence Nil Rate Band (RNRB) £175,000.00
Net Taxable Estate Above Thresholds £150,000.00
Total Statutory 40% IHT Payable £60,000.00

Inheritance Tax (IHT) is a UK tax levied on the net estate (property, money, investments, and physical possessions) of a deceased person.

Understanding how the Nil Rate Band (£325,000) and Residence Nil Rate Band (£175,000) combine allows families to transfer up to £1,000,000 tax-free.

⚙️ Statutory IHT Allowances & Rules for 2026/27

1. Statutory Exemption Thresholds

  • Nil Rate Band (NRB): £325,000 per individual (0% IHT).
  • Residence Nil Rate Band (RNRB): Additional £175,000 per individual if passing your main residence to direct descendants (children, grandchildren).
  • Combined Single Exemption: £500,000 for a single person passing a home to children.
  • Combined Married Couple Exemption: £1,000,000 (spouses can transfer 100% of unused allowances to each other tax-free upon first death).

2. Statutory 40% IHT Rate

The standard rate of Inheritance Tax is 40%, charged only on the net value of the estate that exceeds your combined tax-free allowance threshold.

3. The 7-Year Lifetime Gift Rule (PETs)

Gifts made to individuals while living are Potentially Exempt Transfers (PETs). If you survive for 7 complete years after making a gift, it becomes 100% tax-free. If you die within 7 years, taper relief reduces the tax rate (ranging from 40% down to 8%).


📊 Practical Inheritance Tax Worked Examples

Below are two worked calculation examples illustrating single vs. married estate tax:

Example 1: Single person leaving a £700,000 estate (including £300,000 home to son)
  • Total Net Estate Value: **£700,000.00**
  • Nil Rate Band: **£325,000.00**
  • Residence Nil Rate Band: **£175,000.00**
  • Combined Tax-Free Exemption: **£500,000.00**

Calculation: Taxable Estate = £700,000 - £500,000 = £200,000. IHT @ 40% = £80,000.00.

Total Inheritance Tax Payable: **£80,000.00** (Effective Rate: **11.43%**)
Example 2: Married widow leaving a £1,200,000 estate (using 100% transferred spouse allowance)
  • Total Net Estate Value: **£1,200,000.00**
  • Combined Transferred Allowances (2 × £500,000): **£1,000,000.00** (0% IHT)
  • Taxable Estate Excess: £1,200,000 - £1,000,000 = **£200,000.00**

Calculation: Taxable £200,000 × 40% IHT = £80,000.00.

Total Inheritance Tax Payable: **£80,000.00** (Effective Rate: **6.67%**)

📑 Common Pitfalls & IHT Warnings

  1. The Gift with Reservation of Benefit Trap: If you gift your home to your children but continue living in it rent-free, HMRC treats the gift as a “Gift with Reservation of Benefit.” The property remains 100% inside your estate for IHT purposes.
  2. RNRB Taper Threshold (£2,000,000 Estate Limit): If an estate’s net value exceeds £2,000,000, the Residence Nil Rate Band (£175,000) is reduced by £1 for every £2 over £2M, disappearing entirely at £2.35M.
  3. Charitable Legacy 36% Rate Discount: If you leave at least 10% of your net estate to registered charities in your will, the IHT tax rate on the remainder of your estate drops from 40% down to 36%.

❓ Frequently Asked Questions (FAQ)

No. Gifts and transfers of assets between legally married spouses or civil partners who are UK-domiciled are 100% exempt from Inheritance Tax during lifetime or upon death.

You can gift up to **£3,000 per tax year** completely tax-free (Annual Exemption). Unused annual exemption can be carried forward 1 year. Small gifts of up to £250 per person per year are also exempt.

Defined contribution pension pots are held outside your legal estate and generally pass to designated beneficiaries 100% free of Inheritance Tax regardless of estate size.

Inheritance Tax must be paid within **6 months** after the end of the month in which the person died. Interest is charged by HMRC on any unpaid tax after the 6-month deadline.